Bad manifold

Rob Mo. · Posted: Sat Jan 12, 2013 3:13 pm Post subject: Bad manifold

Been working on a 900 Ford the past couple of days. It's coming together well, but with its lessons learned along the way. Bought a new manifold for it & installed it. The tractor wouldn't even start with it on. Odd, Right? I fixed te original manifold & put it on. The tractor fired right up. After comparing the new with the used, the casing inside the new manifold was a very course casting on the inside, I guess causing it not to flow smoothly. Amazing the there are junk new parts out there.

souNdguy · Posted: Sat Jan 12, 2013 4:27 pm Post subject: Re: Bad manifold

i doubt a simple roughness would cause issue.. but investivate deeper. I have heard of ports 100% blocked..

old · Posted: Sat Jan 12, 2013 6:25 pm Post subject: Re: Bad manifold

I would have to agree with sound ruff should not stop it from running. I would do a rotto rooter test and make sure you can run a wire or other such thing from the carb bolt on flange to each and every one of the intake ends. I would also try a air test so as to make sure you do not have an exhaust and intake cross over

Rob Mo. · Posted: Sat Jan 12, 2013 8:44 pm Post subject: Re: Bad manifold

Wouldn't the engine be labored to create power? Or does it not create enough vacuum to affect its performance?

JMOR · Posted: Sat Jan 12, 2013 9:03 pm Post subject: Re: Bad manifold

" the casing inside the new manifold was a very course casting on the inside, I guess causing it not to flow smoothly."

I guarantee you that you have not found the source of it not running with 'rough' manifold!!!!

Sean in PA · Posted: Sun Jan 13, 2013 4:15 am Post subject: Re: Bad manifold

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